Analyzing meaningless problems is the basis for all education. If you can understand the stupid, it's easier to understand the logical.A voltage is measured between two points, a current flows between two points. Presumably the 10V and 2V mean the voltage between the positive and negative terminals of the respective batteries. Though I do have some sympathy for students who are asked to analyze meaningless circuits.
What i don't understand is why the 12v is distributed between the 2 resistors but at the point A there is 10v. I mean if at that point we've got 10v then why these 10volts aren't distributed between the to resistors instead of the 12v?. In my mind i think that in that point should be 12v so that this tension could drop on the two resistors.Unless it is stated otherwise, the voltage reference for a point in a circuit is usually circuit common or ground. In that case, the voltage between point A and ground is the voltage across the terminals of the 10V source.
As others have said, voltage is always a difference in potential energy (per unit charge) between two points.Hi guys. I just want to know why at the point "A" there is 10 volts and not 12 volts witch is the sum of the two power supplies in series. Thanks!.
Perfect. Thank you. Your analogy was the key.As others have said, voltage is always a difference in potential energy (per unit charge) between two points.
Whenever we talk about the voltage AT a point, the inference is that it is the voltage between that point and some agreed upon common reference point. In your diagram, the chassis ground symbol is identifying that reference point (and it's not the proper symbol to use, but everyone knowns what was meant).
Think of a height analogy. Start at the ground symbol and think of that as actual ground level. Then the 10 V battery is like building a platform ten feet tall and Point A is the top of that platform. Point B is reached by digging a two foot hole in the ground. The two resistors are on a string connecting Point A to Point B. The difference in height between A and B is 12 ft, but A is 10 ft above the ground and B is 2 ft below the ground.
V1 and V2 are NOT in series- they have a ground between them. so V2 is grounded on both sides. Get this, it will help-Hi guys. I just want to know why at the point "A" there is 10 volts and not 12 volts witch is the sum of the two power supplies in series. Thanks!.
View attachment 285249
How is V2 grounded on both sides?V1 and V2 are NOT in series- they have a ground between them. so V2 is grounded on both sides. Get this, it will help-
Title: Understanding Basic Electronics, 1st Ed.
Publisher: The American Radio Relay League
ISBN: 0-87259-398-3
V2 is grounded on the positive side, and it's on ground polarity is on the other side (in other words, neither side of V2 can contribute to adding voltage to the circuit.How is V2 grounded on both sides?
Since there is no other connection to ground in this circuit, the ground symbol only serves to identify the common reference node. V1 and V2 are in series unless and until something else is connected to this ground.
How are you getting that "it's on ground polarity on the other side"? The negative terminal of the batter is connected to Node B. So?V2 is grounded on the positive side, and it's on ground polarity is on the other side (in other words, neither side of V2 can contribute to adding voltage to the circuit.
View attachment 285639
Based on how the battery symbol is drawn for V2, the bottom is (+), and the top is (-). Which matches a series relationship to the other battery (V1). But the Earth Ground a the bottom is the problem.
by Duane Benson
by Duane Benson
by Duane Benson